Port 25 is the default port for incoming and outgoing mail flow. But, it doesn't mean you need to allow port 25 for incoming and outgoing mail to everyone (all). Instead, Exchange Server port 25 should be only accessible from…
Microsoft Outlook mobile app for iOS and Android is free and excellent. But how does it work in the Microsoft Outlook mobile app once you enable send from alias address in Office 365/Microsoft 365? There is no option to select…
Azure AD Connect Synchronization Service Manager shows the status completed-export-errors. However, when we want to look into the details, we only find that it shows the export error dn-attributes-failure. In this article, you will learn why this is happening and…
You have an Exchange Hybrid configuration and want to migrate a mailbox from Exchange Online to Exchange on-premises. Only this time, you get the error Cannot find a recipient that has mailbox GUID. In this article, you will learn why…
Azure AD Connect is an excellent tool that syncs AD on-premises objects to Azure AD. What if the user object is created in the cloud directly and there is no AD on-premises object? Azure AD Connect will not create the…
There is an Event 1310, ASP.NET 4.0.30319.0 warning that keeps showing up in the Event Viewer. To be precise, it appears every 4 minutes. In this article, you will learn why this is happening and the solution for Event 1310,…
We recommend enabling TLS 1.2 on Exchange Server 2013/2016/2019 and disabling TLS 1.0, TLS 1.1, and TLS 1.3. Even though TLS 1.3 is newer, you should disable it. That's because TLS 1.3 is not supported for Exchange Server and causes…
You sometimes want to check which user accounts are disabled in Active Directory. Unfortunately, the Active Directory Users and Computers console is not that great when you want to export specific values. For example, you want to get all disabled…
How to export inactive AD users to CSV file? Sometimes you want to know which user account is inactive so you can block the account or see what's happening. You can use the Active Directory Users and Computers console to…
Security is essential for every organization. When an account password is breached, and access is made to the environment, a lot of confidential stuff will be gathered and leaked. This is a massive problem for every company. Let alone the…